Horrible handling on Dominar 400

Hi people, i'm about to reach 5000km's on my d400. It hasn't been very nice to be honest. Apart from electronic problems there's some issues with handling. Handlebar and even tank wobbles past 140kmh, it also starts to wobble when i pass through some bumps, rear tire apparently slips when taking turns, short story short it's kinda scary and doesn't feel reliable to push. Been riding for almost 10 years and my previous bike was Yamaha r25 and i didn't had such feeling before. If it's something fixable with tire change or alignment i'll stick with it if it's not fixable i'm going to sell it. What's your recommendation?

Hi people, i'm about to reach 5000km's on my d400. It hasn't been very nice to be honest. Apart from electronic problems there's some issues with handling. Handlebar and even tank wobbles past 140kmh, it also starts to wobble when i pass through some bumps, rear tire apparently slips when taking turns, short story short it's kinda scary and doesn't feel reliable to push. Been riding for almost 10 years and my previous bike was Yamaha r25 and i didn't had such feeling before. If it's something fixable with tire change or alignment i'll stick with it if it's not fixable i'm going to sell it. What's your recommendation?